#!/bin/sh
set -e
export LC_ALL=C

type=$1
preversion=$2

package_name()
{
    if dpkg --assert-multi-arch 2>/dev/null; then
        echo libc6:${DPKG_MAINTSCRIPT_ARCH}
    else
        echo libc6
    fi
}

# element() is a helper function for file-rc:
element() {
    local element list IFS

    element="$1"

    [ "$2" = "in" ] && shift
    list="$2"
    [ "$list" = "-" ] && return 1
    [ "$list" = "*" ] && return 0

    IFS=","
    set -- $list
    case $element in
	"$1"|"$2"|"$3"|"$4"|"$5"|"$6"|"$7"|"$8"|"$9")
	    return 0
    esac
    return 1
}

# filerc (runlevel, service) returns /etc/init.d/service, if service is
# running in $runlevel:
filerc() {
    local runlevel basename
    runlevel=$1
    basename=$2
    while read LINE
    do
	case $LINE in
	    \#*|"") continue
	esac

	set -- $LINE
	SORT_NO="$1"; STOP="$2"; START="$3"; CMD="$4"
	[ "$CMD" = "/etc/init.d/$basename" ] || continue

	if element "$runlevel" in "$START" || element "S" in "$START"
	then
	    echo "/etc/init.d/$basename"
	    return 0
	fi
    done < /etc/runlevel.conf
    echo ""
}

checkpkgver () {
    local status pkg
    pkg=$1
    status=$(dpkg -s $pkg 2>/dev/null | grep ^Status: | sed -e 's/^Status: \(.*\) \(.*\) \(.*\)/\3/g')
    if [ -n "$status" ] && [ "$status" != "not-installed" ] && [ "$status" != "config-files" ]; then
	echo $(dpkg -s $pkg 2>/dev/null | grep ^Version: | sed -e 's/^Version: *//');
    fi
}

if [ "$type" = "configure" ]
then
    # We don't use a registry anymore, remove the old file
    rm -f /etc/ld.so.hwcappkgs
 
    # /etc/ld.so.nohwcap code:
        # Handle upgrades when libc-opt package has been installed.
    # When a /etc/ld.so.nohwcap file exists, ld.so only use libraries
    # from /lib, and ignore all optimised libraries. This file is
    # inconditionaly created in the preinst script of libc.
 
    # Get the list of optimized packages for a given architecture
    # Before removing a package from this list, make sure it appears
    # in the Conflicts: line of libc.
    case $(dpkg --print-architecture) in
        alpha)
            hwcappkgs="libc6-alphaev67"
            ;;
        i386)
            hwcappkgs="libc6-i686 libc6-xen"
            ;;
        kfreebsd-i386)
            hwcappkgs="libc0.1-i686"
            ;;
        sparc)
            hwcappkgs="libc6-sparcv9 libc6-sparcv9b"
            ;;
    esac
 
    # We check the version between the current installed libc and
    # all optimized packages (on architectures where such packages
    # exists).
    all_upgraded=yes
    if [ -n "$hwcappkgs" ]; then
        for pkg in $hwcappkgs ; do
            ver=$(dpkg-query -l $pkg 2>/dev/null | sed -e '/^[a-z][a-z]\s/!d;/^.[nc]/d;' -e "s/^..\s\+$pkg[0-9a-z:]*\s\+//;s/\s.*//g")
            if [ -n "$ver" ] && [ "$ver" != "2.23-0ubuntu3" ]; then
                all_upgraded=no
            fi
        done
    fi

    # If the versions of all optimized packages are the same as the libc
    # one, we could remove /etc/ld.so.nohwcap. Otherwise, it will be removed
    # when all optimized packages are upgraded or removed.
    if [ "$all_upgraded" = yes ] ; then
        rm -f /etc/ld.so.nohwcap
    fi


    # Load debconf module if available
    if [ -f /usr/share/debconf/confmodule ] ; then
	. /usr/share/debconf/confmodule
    fi

    if [ -n "$preversion" ]; then
	if [ ! -d /var/mail ] && [ ! -L /var/mail ]; then
	    ln -sf spool/mail /var/mail
	fi
	if dpkg --compare-versions "$preversion" lt 2.23; then
	    check=""
	    [ -f /var/run/services.need_restart ] && check=$(cat /var/run/services.need_restart 2>/dev/null)
	    # Change service names back into package names, so that we can
	    # double-check package installation.
	    check=$(echo "$check" | \
	            sed -e's/\bapache2\b/apache2.2-common/g' \
	                -e's/\batd\b/at/g' \
	                -e's/\bdovecot\b/dovecot-common/g' \
	                -e's/\bexim4\b/exim4-base/g' \
	                -e's/\blpd\b/lpr/g' \
	                -e's/\blpd-ppd\b/lpr-ppd/g' \
	                -e's/\bmysql\b/mysql-server/g' \
	                -e's/\bsaslauthd\b/sasl2-bin/g' \
	    )

	    # Check to see which of the services that were running at unpack
	    # time are still around
            # the following substitution processes the check variable
            # and returns results in the services variable
	    # NSS services check: 
	    	    echo -n "Checking for services that may need to be restarted..."
	    # Only get the ones that are installed, and configured
	    check=$(dpkg -s $check 2> /dev/null | egrep '^Package:|^Status:' | awk '{if ($1 ~ /^Package:/) { package=$2 } else if ($0 ~ /^Status: .* installed$/) { print package }}')
	    # some init scripts don't match the package names
	    check=$(echo $check | \
	    	    sed -e's/\bapache2.2-common\b/apache2/g' \
	    	    	-e's/\bat\b/atd/g' \
	    	    	-e's/\bdovecot-common\b/dovecot/g' \
	    	    	-e's/\bexim4-base\b/exim4/g' \
	    	    	-e's/\blpr\b/lpd/g' \
	    	    	-e's/\blpr-ppd\b/lpd-ppd/g' \
	    	    	-e's/\bmysql-server\b/mysql/g' \
	    	    	-e's/\bsasl2-bin\b/saslauthd/g' \
	    )
	    echo
	    echo "Checking init scripts..."
	    rl=$(runlevel | sed 's/.*\ //')
	    for service in $check; do
	    	if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
	    	    invoke-rc.d ${service} status >/dev/null 2>/dev/null && status=0 || status=$?
	    	    if [ "$status" = "0" ] || [ "$status" = "2" ] ; then
	    	    	services="$service $services"
	    	    elif [ "$status" = "100" ] ; then
	    	    	echo "WARNING: init script for $service not found."
	    	    fi
	    	else
	    	    if [ -f /usr/share/file-rc/rc ] || [ -f /usr/lib/file-rc/rc ] && [ -f /etc/runlevel.conf ]; then
	    	    	idl=$(filerc $rl $service)
	    	    else
	    	    	idl=$(ls /etc/rc${rl}.d/S??${service} 2> /dev/null | head -1)
	    	    fi
	    	    if [ -n "$idl" ] && [ -x $idl ]; then
	    	    	services="$service $services"
	    	    fi
	    	fi
	    done

	    # If there are services that we *stopped* in the preinst, don't
	    # forget to restart them now
	    if [ -e /var/run/services.need_start ]; then
		services="$(cat /var/run/services.need_start) $services"
	    fi
	    if [ -n "$services" ]; then
		echo "Restarting services possibly affected by the upgrade:"
		failed=""
		for service in $services; do
		    # We can't just use a generic rewrite here, as it was
		    # samba in wheezy and smbd in jessie, which confuses.
		    if [ "$service" = "samba" ]; then
			if [ -x /etc/init.d/smbd ] || [ -f /etc/init/smbd ]; then
			    service="smbd"
			fi
		    fi
		    if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
			idl="invoke-rc.d ${service}"
			idlopt="restart"
		    elif [ -f /usr/share/file-rc/rc ] || [ -f /usr/lib/file-rc/rc ] && [ -f /etc/runlevel.conf ]; then
			idl=$(filerc $rl $service)
			idlopt="restart"
		    else
			idl=$(ls /etc/rc${rl}.d/S??${service} 2> /dev/null | head -1)
			idlopt="restart"
		    fi
		    echo -n "  $service: restarting..."
		    if $idl $idlopt > /dev/null 2>&1; then
			echo "done."
		    else
			echo "FAILED! ($?)"
			failed="$service $failed"
		    fi
		done
	
		echo
		if [ -n "$failed" ]; then
		    if [ -f /usr/share/debconf/confmodule ] ; then
			db_fset glibc/restart-failed seen false
			db_subst glibc/restart-failed services "$failed"
			if [ "$RELEASE_UPGRADE_MODE" = desktop ]; then
			    db_input medium glibc/restart-failed || true
			else
			    db_input critical glibc/restart-failed || true
			fi
			db_go || true
		    else
			echo "The following services failed to start: $failed"
			echo
			echo "You will need to start these manually by running \`/etc/init.d/<service> start'"
			echo "If the service still fails to start, you may need to file a bug on"
			echo "$(package_name) or the service involved."
			frontend=`echo "$DEBIAN_FRONTEND" | tr '[:upper:]' '[:lower:]'`
			if [ "$frontend" != noninteractive ]; then
			    echo
			    echo -n "Press ENTER to continue: "
			    read foo
			fi
		    fi
		else
		    echo "Services restarted successfully."
		    rm -f /var/run/services.need_start /var/run/services.need_restart
		fi
	
		# Shut down the frontend, to make sure none of the
		# restarted services keep a connection open to it
		if [ -f /usr/share/debconf/confmodule ] ; then
		    db_stop
		fi
	    else
		echo "Nothing to restart."
	    fi
	fi # end upgrading and $preversion lt 2.23
	# give a reboot notification on al upgrades (LP: #1546457)
	if [ -x /usr/share/update-notifier/notify-reboot-required ]; then
	    /usr/share/update-notifier/notify-reboot-required
	fi
    fi # Upgrading

    # Restart init.  Currently handles chroots, systemd and upstart, and
    # assumes anything else is going to not fail at behaving like
    # sysvinit:
    TELINIT=yes
    if ischroot 2>/dev/null; then
        # Don't bother trying to re-exec init from a chroot:
        TELINIT=no
    elif [ -d /run/systemd/system ]; then
        # Skip if systemd is the active PID 1, since systemd doesn't
        # need a reexec for a clean shutdown
        TELINIT=no
    elif [ -x "`which initctl`" ]; then
        UPSTART=$(initctl version 2>/dev/null | awk '/upstart/ {print $3}' | tr -d ')')
        if dpkg --compare-versions "$UPSTART" lt-nl 1.6.1; then
            # This is an old upstart that can't re-exec statefully:
            TELINIT=no
            touch /var/run/init.upgraded
        fi
    fi
    if [ "$TELINIT" = "yes" ]; then
        telinit u 2>/dev/null || true ; sleep 1
    fi
fi

# We now use the multiarch triplet instead of the GNU triplet for the ld.so
# configuration file, in order to keep a stable path. Remove the old file.
case ${DPKG_MAINTSCRIPT_ARCH:-$(dpkg --print-architecture)} in
    hurd-i386)
        dpkg-maintscript-helper rm_conffile /etc/ld.so.conf.d/i486-gnu.conf 2.19-11~ libc0.3:hurd-i386 -- "$@"
        dpkg-maintscript-helper rm_conffile /etc/ld.so.conf.d/i486-gnu-gnu.conf 2.19-11~ libc0.3:hurd-i386 -- "$@"
        ;;
    i386)
        dpkg-maintscript-helper rm_conffile /etc/ld.so.conf.d/i486-linux-gnu.conf 2.19-4~ libc6:i386 -- "$@"
        dpkg-maintscript-helper rm_conffile /etc/ld.so.conf.d/i686-linux-gnu.conf 2.19-13~ libc6:i386 -- "$@"
        ;;
    kfreebsd-i386)
        dpkg-maintscript-helper rm_conffile /etc/ld.so.conf.d/i486-kfreebsd-gnu.conf 2.19-11~ libc0.1:kfreebsd-i386 -- "$@"
        ;;
esac



exit 0
